Quartz Tuning Fork: Thermometer, Pressure- and Viscometer for Helium Liquids

Quartz Tuning Fork: Thermometer, Pressure- and Viscometer for Helium Liquids

Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland Institute of Physics ASCR, Na Slovance 2, 182 21 Prague, Czech Republic Centre of Low Temperature Physics, Institute of Experimental Physics SAV, Košice, Slovakia Kapitza Institute for Physical Problems, Kosygina 2, Moscow 119334, Russia Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prag...

Introduction to the quartz tuning fork

We discuss various aspects of the quartz tuning fork, ranging from its original purpose as a high quality factor resonator for use as a stable frequency reference, to more exotic applications in sensing and scanning probe microscopy. We show experimentally how to tune the quality factor by injecting energy in phase with the current at resonance quality factor increase or out of phase quality fa...

Improved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopy

We report on a quartz-enhanced photoacoustic (QEPAS) sensor for methanol (CH₃OH) detection employing a novel quartz tuning fork (QTF), specifically designed to enhance the QEPAS sensing performance in the terahertz (THz) spectral range. A discussion of the QTF properties in terms of resonance frequency, quality factor and acousto-electric transduction efficiency as a function of prong sizes and...

Finite Element Analysis of Electrically Excited Quartz Tuning Fork Devices

Quartz Tuning Fork (QTF)-based Scanning Probe Microscopy (SPM) is an important field of research. A suitable model for the QTF is important to obtain quantitative measurements with these devices. Analytical models have the limitation of being based on the double cantilever configuration. In this paper, we present an electromechanical finite element model of the QTF electrically excited with two...

Quartz-enhanced photoacoustic spectroscopy exploiting tuning fork overtone modes